echo 'digraph {

"Seiji Amasawa" -> "Shiro Nishi" [taillabel = "Grandfather of"]
"Shizuku Tsukishima" -> "Seiji Amasawa" [taillabel = "Boyfriend of"]
"Shiro Nishi" -> "Seiji Amasawa" [taillabel = "Grandson of"]
}' | dot -Tsvg > output.svg